Ketone Bodies (Urine)
Does this test have other names?
Ketone test, urine ketones
What is this test?
This test is used to check the level of ketones in your urine. Normally, your body
burns sugar for energy. But if you don't have enough sugar in your body for energy,
your body burns fat instead and produces substances called ketones. The ketones end
up in your blood and urine.
It's normal to have a small amount of ketones in your body. But high ketone levels
could result in serious illness or death. Checking for ketones keeps this from happening.
Why do I need this test?
You may need this test if you have a high level of blood sugar, which can happen if
you have diabetes. People with diabetes often have high ketone levels because they
don't make enough insulin. Or their body doesn't respond well to insulin, and they
can't use the sugar in the blood for energy. If you have high blood sugar levels and
type 1 or type 2 diabetes, it's important to check your ketone levels.
People without diabetes can also have ketones in the urine if their body is using
fat for fuel instead of glucose. This can happen with chronic vomiting, extreme exercise,
low-carbohydrate diets, or eating disorders.
Checking your ketones is especially important if you have diabetes and:
Your healthcare provider may order this test, or have you test yourself, if you:
Are often quite thirsty or tired
Have muscle aches
Are tired (fatigued)
Have weight loss
Have shortness of breath or trouble breathing
Have nausea, vomiting, or belly (abdominal) pain
Have a fruity smell to your breath
What other tests might I have along with this test?
Your healthcare provider may also check for ketones in your blood if you have high
levels of ketones in your urine.
If your healthcare provider suspects you have diabetes, they may order other urine
or blood tests to check for these substances:
Blood sugar (glucose)
Acid level (pH)
What do my test results mean?
Test results may vary depending on your age, gender, health history, the method used
for the test, and other things. Your test results may not mean you have a problem.
Ask your healthcare provider what your test results mean for you.
Some ketone tests give the results in numbers. Others only tell you if your ketone
levels are "trace," "small," or "large." If your test strip gives you a number, you
can learn your normal range. Normal results vary depending on your condition. Talk
with your healthcare provider about your results and what levels are dangerous for
you. Ask what you should do when your numbers are in the dangerous range. Don't hesitate
to ask your provider to write down the instructions.
How is the test done?
This test can be done at home or in a lab using test strips. Collect your urine in
a clean container and put a test strip in it. The strip changes color as it reacts
to the ketones.
If you do this test at home, keep a record of the results to report to your healthcare
provider at your next visit.
Does this test pose any risks?
This test poses no known risks.
What might affect my test results?
Exercising strenuously, taking certain medicines, and following a special diet, such
as a low-carb or high-fat diet, may affect the test. Ask your healthcare provider
if you should skip any foods before taking the test.
How do I get ready for this test?
You may have to take this test if your fasting blood sugar levels are high. Ask your
healthcare provider when you should take the test and if you should fast, especially
if you do this test at home. Be sure your healthcare provider knows about all medicines,
herbs, vitamins, and supplements you are taking. This includes medicines that don't
need a prescription and any illegal drugs you may use.